Researchers discover spontaneous liquefaction of solid metal–liquid metal interfaces in colloidal binary alloys The boundary between solid metal and liquid metal can be much less "solid" than we ever suspected. RMIT researchers have discovered that the liquid-solid boundary can fluctuate back and forth, with metallic atoms near the surface breaking free from their crystal lattice.
https://phys.org/news/2024-05-....spontaneous-liquefac